Question

Heya guys!! plez plz answer this question !

Its MCQ(with more than 1 option correct):

A particle initially at rest is subjected to two forces. One is constant, the other is a retarding force
proportional to the particle velocity. In the subsequent motion of the particle:
(A) the acceleration will increase from zero to a constant value
(B) the acceleration will decrease from its initial value to zero
(C) the velocity will increase from zero to maximum & then decrease
(D) the velocity will increase from zero to a constant value.


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Answer 1

Explanation:

As the velocity increases the net force will decrease. When both retarding and constant forces become equal then net force is zero. Hence the velocity is maximum and acceleration will increase from zero to constant .

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Answer 2

Explanation:

1. retarding force means opposite lagne vàla force
2. so acceleration decrease